[llvm-commits] CVS: llvm/lib/Transforms/Scalar/ADCE.cpp

[Chris Lattner]

Changes in directory llvm/lib/Transforms/Scalar:

ADCE.cpp updated: 1.85 -> 1.86
---
Log message:

More minor microoptimizations


---
Diffs of the changes:  (+4 -6)

Index: llvm/lib/Transforms/Scalar/ADCE.cpp
diff -u llvm/lib/Transforms/Scalar/ADCE.cpp:1.85 llvm/lib/Transforms/Scalar/ADCE.cpp:1.86
--- llvm/lib/Transforms/Scalar/ADCE.cpp:1.85	Sun Dec 12 16:22:18 2004
+++ llvm/lib/Transforms/Scalar/ADCE.cpp	Sun Dec 12 16:44:30 2004
@@ -264,8 +264,6 @@
       for (pred_iterator PI = pred_begin(I), E = pred_end(I); PI != E; ++PI)
         markInstructionLive((*PI)->getTerminator());
 
-
-
   DEBUG(std::cerr << "Processing work list\n");
 
   // AliveBlocks - Set of basic blocks that we know have instructions that are
@@ -291,12 +289,12 @@
     // makes the predecessors alive.
     //
     if (PHINode *PN = dyn_cast<PHINode>(I))
-      for (pred_iterator PI = pred_begin(BB), PE = pred_end(BB); PI != PE; ++PI)
-        if (AliveBlocks.insert(*PI).second) // Block is now ALIVE!
-          markBlockAlive(*PI);
+      for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
+        if (AliveBlocks.insert(PN->getIncomingBlock(i)).second)
+          markBlockAlive(PN->getIncomingBlock(i));     // Block is newly ALIVE!
 
     // Loop over all of the operands of the live instruction, making sure that
-    // they are known to be alive as well...
+    // they are known to be alive as well.
     //
     for (unsigned op = 0, End = I->getNumOperands(); op != End; ++op)
       if (Instruction *Operand = dyn_cast<Instruction>(I->getOperand(op)))